Annals of the Missouri Botanical Garden最新文献_第7页

Taxonomic Revision of Kaunia (Eupatorieae, Asteraceae), an Andean Genus with Presence in Eastern South America1 存在于南美洲东部的安第斯山梨属的分类修正[j]

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-11-22 DOI: 10.3417/2019415

J. N. Viera Barreto, G. Sancho

引用次数: 2

A Taxonomic Revision of Heterosperma (Asteraceae: Coreopsideae)1 异精子门（Astraceae:Coreopsidae）的分类学修订1

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-11-20 DOI: 10.3417/2019374

Mabel A. Lizarazu, S. Freire

引用次数: 1

Taxonomic Revision of Chionoloma (Pottiaceae, Bryophyta)1 Chionoloma（Pottiacee，Bryophyta）的分类学修订1

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-11-18 DOI: 10.3417/2019381

M. Alonso, J. A. Jiménez, M. Cano

引用次数: 11

A Taxonomic Revision of the Othonna Bulbosa Group (Asteraceae: Senecioneae: Othonninae)1 紫檀属植物群的分类学修订（菊科：千里光科：紫檀科）1

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-11-12 DOI: 10.3417/2019340

S. L. Magoswana, J. Boatwright, A. R. Magee, J. Manning

{"title":"A Taxonomic Revision of the Othonna Bulbosa Group (Asteraceae: Senecioneae: Othonninae)1","authors":"S. L. Magoswana, J. Boatwright, A. R. Magee, J. Manning","doi":"10.3417/2019340","DOIUrl":"https://doi.org/10.3417/2019340","url":null,"abstract":"Abstract Othonna L. (Asteraceae: Senecioneae: Othonninae) is a genus of some 120 species concentrated in the Greater Cape Floristic Region (GCFR) of South Africa, with a few species extending into southern Namibia, Angola, and Zimbabwe. The South African species of Othonna were last revised more than a century ago, and many species, particularly from the southern African winter rainfall region, remain poorly understood. This study focused on the geophytic species comprising the O. bulbosa group, distinguished by their tuberous rootstock and annual, leafy, aerial stems. A comprehensive taxonomic treatment is presented, including descriptions, complete nomenclature and typification, illustrations, and geographical distribution. Twenty-five species are recognized, of which four are newly described (O. lilacina Magoswana & J. C. Manning, O. nigromontana Magoswana & J. C. Manning, O. revoluta Magoswana & J. C. Manning, and O. sinuata Magoswana & J. C. Manning), and 18 names are reduced to synonymy. The species differ in habit, shape and incision of foliage, capitulum type (radiate vs. disciform), number of involucral bracts, pappus length, and cypselae (myxogenic vs. nonmyxogenic). We place the species into four morphologically diagnosable series (series Heterophyllae Magoswana & J. C. Manning, series Disciformes Magoswana & J. C. Manning, series Perfoliatae Magoswana & J. C. Manning, and series Undulosae Magoswana & J. C. Manning) based on habit and capitulum type.","PeriodicalId":55510,"journal":{"name":"Annals of the Missouri Botanical Garden","volume":"104 1","pages":"515 - 562"},"PeriodicalIF":1.9,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47881140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

In Memoriam: James L. Zarucchi (1952–2019) 纪念:詹姆斯·扎鲁奇(1952-2019)

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-09-19 DOI: 10.3417/2019515

J. Zarucchi

引用次数: 1

Hawkmoth Pollination Facilitates Long-Distance Pollen Dispersal and Reduces Isolation Across a Gradient of Land-Use Change 1 Hawkmoth授粉促进花粉远距离分散并减少土地利用变化梯度的隔离1

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-09-16 DOI: 10.3417/2019475

Krissa A. Skogen, R. Overson, Evan T Hilpman, J. Fant

{"title":"Hawkmoth Pollination Facilitates Long-Distance Pollen Dispersal and Reduces Isolation Across a Gradient of Land-Use Change 1","authors":"Krissa A. Skogen, R. Overson, Evan T Hilpman, J. Fant","doi":"10.3417/2019475","DOIUrl":"https://doi.org/10.3417/2019475","url":null,"abstract":"Abstract Land-use change is among the top drivers of global biodiversity loss, which impacts the arrangement and distribution of suitable habitat for species. Population-level effects include increased isolation, decreased population size, and changes to mutualistic and antagonistic interactions. However, the extent to which species are impacted is determined by life history characteristics including dispersal. In plants, mating dynamics can be changed in ways that can negatively impact population persistence if dispersal of pollen and/or seed is disrupted. Long-distance dispersal has the potential to buffer species from the negative impacts of land-use change. Biotic vectors of long-distance dispersal have been less frequently studied, though specific taxa are known to travel great distances. Here, we describe population genetic diversity and structure in a sphingophilous species that is experiencing habitat fragmentation through land-use change, Oenothera harringtonii W. L. Wagner, Stockh. & W. M. Klein (Onagraceae). We use 12 nuclear and four plastid microsatellite markers and show that pollen dispersal by hawkmoths drives high gene flow and low population differentiation despite a range-wide gradient of land-use change and habitat fragmentation. By separating the contributions of pollen and seed dispersal to gene flow, we show that most of the genetic parameters are driven by hawkmoth-facilitated long-distance pollen dispersal, but populations with small, effective population sizes experience higher levels of relatedness and inbreeding. We discuss considerations for conservation efforts for this and other species that are pollinated by long-distance dispersers.","PeriodicalId":55510,"journal":{"name":"Annals of the Missouri Botanical Garden","volume":"104 1","pages":"495 - 511"},"PeriodicalIF":1.9,"publicationDate":"2019-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42371111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

The Claytonia arctica Complex in Alaska—Analyzing a Beringian Taxonomic Puzzle Using Taxonomic Concepts1 阿拉斯加克莱顿北极复合体——用分类概念分析白令陆桥分类难题

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-09-11 DOI: 10.3417/2019491

Stefanie M. Ickert‐Bond, David Murray, M. Oliver, Hazel Berrios, Campbell O. Webb

{"title":"The Claytonia arctica Complex in Alaska—Analyzing a Beringian Taxonomic Puzzle Using Taxonomic Concepts1","authors":"Stefanie M. Ickert‐Bond, David Murray, M. Oliver, Hazel Berrios, Campbell O. Webb","doi":"10.3417/2019491","DOIUrl":"https://doi.org/10.3417/2019491","url":null,"abstract":"Abstract Trans-Beringia taxa often present complex puzzles for taxonomists, a reflection of differing traditions and opinions, taxonomic approaches, and access to material from both sides of the Bering Strait. There is wide biological variation in perceived or circumscribed taxa whose populations are widespread within the regions and yet biogeographically isolated in Asia and/or America. The Claytonia arctica complex is one such example; it illustrates these issues well and has been dealt with by North American and Russian botanists in decidedly different ways. We reviewed specimens and examined the various taxonomic concepts of C. arctica through time and source publications. The relationships (alignments) among taxonomic concepts are presented in a graphical format. We found that much of the confusion related to C. arctica in Beringia stems from overlooking C. scammaniana Hultén sensu Hultén (1939), and placing too much emphasis on the woody caudex and perennation structures, during the creation of two taxonomic concepts: C. arctica Adams sensu Porsild and C. porsildii Jurtzev sensu Yurtsev. The C. arctica complex (in our current sense) is an evolutionary work in progress, resulting in partially differentiated races with much overlapping variability and intergradation of characters (particularly in C. scammaniana according to our current sense) that have not reached the level of stability (i.e., individuals may still intergrade freely) usually associated with the concept of species in other arctic lineages.","PeriodicalId":55510,"journal":{"name":"Annals of the Missouri Botanical Garden","volume":"104 1","pages":"478 - 494"},"PeriodicalIF":1.9,"publicationDate":"2019-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45797419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Genomic Identity of White Oak Species in an Eastern North American Syngameon1 北美东部一个群落中白橡树物种的基因组特征1

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-09-05 DOI: 10.3417/2019434

A. Hipp, A. Whittemore, Mira Garner, M. Hahn, Elisabeth Fitzek, E. Guichoux, J. Cavender-Bares, Paul F. Gugger, P. Manos, I. Pearse, C. Cannon

{"title":"Genomic Identity of White Oak Species in an Eastern North American Syngameon1","authors":"A. Hipp, A. Whittemore, Mira Garner, M. Hahn, Elisabeth Fitzek, E. Guichoux, J. Cavender-Bares, Paul F. Gugger, P. Manos, I. Pearse, C. Cannon","doi":"10.3417/2019434","DOIUrl":"https://doi.org/10.3417/2019434","url":null,"abstract":"Abstract The eastern North American white oaks, a complex of approximately 16 potentially interbreeding species, have become a classic model for studying the genetic nature of species in a syngameon. Genetic work over the past two decades has demonstrated the reality of oak species, but gene flow between sympatric oaks raises the question of whether there are conserved regions of the genome that define oak species. Does gene flow homogenize the entire genome? Do the regions of the genome that distinguish a species in one part of its range differ from the regions that distinguish it in other parts of its range, where it grows in sympatry with different species? Or are there regions of the genome that are relatively conserved across species ranges? In this study, we revisit seven species of the eastern North American white oak syngameon using a set of 80 single-nucleotide polymorphisms (SNPs) selected in a previous study because they show differences among, and consistency within, the species. We test the hypothesis that there exist segments of the genome that do not become homogenized by repeated introgression, but retain distinct alleles characteristic of each species. We undertake a range-wide sampling to investigate whether SNPs that appeared to be fixed based on a relatively small sample in our previous work are fixed or nearly fixed across the range of the species. Each of the seven species remains genetically distinct across its range, given our diagnostic set of markers, with relatively few individuals exhibiting admixture of multiple species. SNPs map back to all 12 Quercus linkage groups (chromosomes) and are separated from each other by an average of 7.47 million bp (± 8.74 million bp, SD), but are significantly clustered relative to a random null distribution, suggesting that our SNP toolkit reflects genome-wide patterns of divergence while potentially being concentrated in regions of the genome that reflect a higher-than-average history of among-species divergence. This application of a DNA toolkit designed for the simple problem of identifying species in the field has two important implications. First, the eastern North American white oak syngameon is composed of entities that most taxonomists would consider “good species.” Second, and more fundamentally, species in the syngameon are genetically coherent because characteristic portions of the genome remain divergent despite a history of introgression. Understanding the conditions under which some loci diverge while others introgress is key to understanding the origins and maintenance of global tree diversity.","PeriodicalId":55510,"journal":{"name":"Annals of the Missouri Botanical Garden","volume":"104 1","pages":"455 - 477"},"PeriodicalIF":1.9,"publicationDate":"2019-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44564588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

The Limits to Adaptation in Restored Ecosystems and How Management Can Help Overcome Them1 恢复生态系统的适应限制以及管理如何帮助克服这些限制

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-08-30 DOI: 10.3417/2019430

J. Lau, Susan M. Magnoli, Chad R. Zirbel, L. Brudvig

引用次数: 8

Fine-Scale to Flora-Wide Phylogenetic Perspectives on Californian Plant Diversity, Endemism, and Conservation1,2 加州植物多样性、地方性和保护的精细尺度到植物区系全系统发育展望1,2

IF 1.9 3区生物学

Annals of the Missouri Botanical Garden Pub Date : 2019-08-28 DOI: 10.3417/2019423

B. G. Baldwin

{"title":"Fine-Scale to Flora-Wide Phylogenetic Perspectives on Californian Plant Diversity, Endemism, and Conservation1,2","authors":"B. G. Baldwin","doi":"10.3417/2019423","DOIUrl":"https://doi.org/10.3417/2019423","url":null,"abstract":"Abstract The California Floristic Province (CA-FP) encompasses North America's Mediterranean-type climatic region and is a global biodiversity hotspot in temperate North America. Fine-scale phylogenetic studies and increasing scrutiny of morphological, ecological, and geographic variation in the CA-FP vascular flora continue to reveal novel, often cryptic diversity warranting taxonomic attention. The prevalence of such discoveries warrants caution about potential for loss of undescribed or unrecognized biodiversity from human-related impacts, including insufficiently informed conservation-related actions (e.g., genetic augmentation or assisted migration). Broader-scale molecular phylogenetic studies have yielded other examples of more extensive CA-FP diversification than previously resolved. For example, clades uniting CA-FP taxa not earlier thought to be such close relatives have been discovered in a wide diversity of tribes of composites and legumes. This understanding adds additional weight to the conclusions of Raven and Axelrod (1978) that in situ evolution, especially since the pronounced mid-Miocene transition toward summer-drying, has been a major factor in the origins of Californian vascular plant diversity. The importance of paleo-endemism in gymnosperms and (especially woody) angiosperms of the CA-FP flora also has been corroborated and refined by molecular phylogenetic studies, with improved understanding of the timing of divergence and relationships of isolated lineages, such as the extinct island-endemic Hesperelaea A. Gray (Oleaceae). On a regional scale, studies of spatial patterns of Californian species richness, phylogenetic diversity, and phylogenetic endemism by the California Plant Phylodiversity Project (CPPP) have reinforced the floristic importance of areas of high topographic complexity, or environmental heterogeneity more generally, where relatively high levels of habitat diversity, speciation, and lineage persistence may be expected. The CPPP's finding that particularly young plant lineages and significantly high phylogenetic endemism are concentrated in drier regions of the CA-FP and in the adjacent Californian deserts has corroborated earlier preliminary findings and aligns with Stebbins's (1952) hypothesis of aridity as an evolutionary stimulus. A recent conservation gap analysis by the CPPP incorporating flora-wide phylogenetic and geographic occurrence data plus land-protection status and habitat-integrity information for California has demonstrated the potential of an integrative, evolutionary approach for identifying high-priority land conservation targets.","PeriodicalId":55510,"journal":{"name":"Annals of the Missouri Botanical Garden","volume":"104 1","pages":"429 - 440"},"PeriodicalIF":1.9,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44257160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6